What is the effect on the magnitude of pure reactance when it is converted to susceptance?

Susceptance (B) is the imaginary part of admittance, which is the reciprocal of impedance. For a circuit with pure reactance (X), the impedance is simply jX. When you convert this pure reactance to admittance, you take its reciprocal: 1 / jX. Mathematically, this equals -j(1/X). While the sign of the phase angle changes, the question specifically asks what happens to the magnitude. The magnitude of the new value (susceptance) is exactly 1/X. Therefore, the magnitude of a pure reactance is replaced by its mathematical reciprocal when converted to susceptance.